Original Parts Group Logo
US & Canada Phone Number 1-800-243-8355
International Phone Number 1-562-594-1000
 Riviera Presidents
Part fits the following years:1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976


1963-76 Riviera Transmission, TH350/TH400 Performance TH400 (6" Ext. Housing)

Part# G221184


Mfg# 13421-6

1 Review

SAVE: $110.50 Retail: $1207.95

OPGI Price: $1097.45

Part Type: (P) High Performance, designed to improve performance TH = Turbo Hydramantic shift transmissions
Years: Sold As: EACH

Performance automatic transmissions built to take it

  • NOTE1: All 364-401-425 Nailhead engines require an adapter for use with this transmission.
  • NOTE2: These high-performance items are not eligible for any further discounts or promotional pricing.
  • SHIP NOTE: This item cannot be shipped FedEx Ground and requires Truck Freight Delivery which must be prepaid by credit or check (no C.O.D). Please call or email us for an exact quote. more info

Whether you have a stock engine or one that’s built-to-the-hilt, you don’t want to have an automatic trans that just slides into gear. You need one that shifts positively into each gear, especially at wide-open throttle. That’s why we sell these performance automatic transmissions from California Performance Transmission. With over 5 decades of performance automatic transmission rebuilding experience, CPT transmissions are designed for the rigors of the street and strip. They use heavy-duty clutches and bands along with a complete blueprinting that includes modifications for improved lubrication and increased thrust capacity. The driver has their choice of either complete manual or automatic control of the transmission because of the CPT manual/automatic hi-tech valve body kit installed in each transmission. The TH350 uses the standard gear ratios of 2.52 first, 1.52 second and 1.00 third. The TH400 has a 2.48 first, 1.48 second and 1.00 third. These street/strip transmissions are exact bolt-in replacements for your stock transmission and have all the heavy-duty features described above.

Please note, these transmissions have a full 90-day warranty and are then subsequently guaranteed against defective workmanship for 2 full years from the purchase date. After 90 days, for 2 years, California Performance Transmissions will completely rebuild or overhaul, under warranty, the transmission for $250.00 plus hard parts to the original owner or $300.00 plus hard parts to any subsequent owner if the warranty is transferred. This overhaul or rebuild includes a new factory warranty.

Make & ModelYear RangeApplication Details
Pontiac GTO1961-1973 TH400 (6" Ext. Housing)
Pontiac LeMans1961-1973 TH400 (6" Ext. Housing)
Pontiac Tempest1961-1973 TH400 (6" Ext. Housing)
Pontiac Grand Prix1964-1977 TH400 (6" Ext. Housing)
Pontiac Catalina1964-1977 TH400 (6" Ext. Housing)
Pontiac Bonneville1964-1977 TH400 (6" Ext. Housing)
Olds Cutlass/4421961-1977 TH400 (6" Ext. Housing)
Buick Skylark1961-1972 TH400 (6" Ext. Housing)
Buick Riviera1963-1976 TH400 (6" Ext. Housing)
It's Arriving Soon!
Estimated to arrive the
week of February 19th
Point Coins Earn 1097 points more info
Switch to Mobile Site »
If you see this, please contact your IT department and ask them to unblock www.opgi-static.com